A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to rise? The molecules in the water move closer together. The molecules in the thermometer’s liquid spread apart. The kinetic energy of the water molecules decreases. The kinetic energy of the thermometer’s liquid molecules decreases.
The hotter it gets, the faster the molecules are moving. Making the molecules further apart. The cooler it gets, the slower the molecules move, allowing them to get closer together. I hope this helped!